Trochlear nerve conveys proprioceptor impulses from the medial rectus muscle to brain?

No, the trochlear nerve does not convey proprioceptor impulses from the medial rectus muscle to the brain. The trochlear nerve innervates the superior oblique muscle of the eye, and it is responsible for transmitting signals from the brain to the superior oblique muscle to control its movement. The proprioceptor impulses from the medial rectus muscle are conveyed to the brain by the abducens nerve.